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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02baee203b5eb8d1e4a8a7a39b874bf5b26089ea574e91c4da5e730c98295bce' 
  AND token = '02G9A2DOqOCiH8nx5T/fl+/hqp2m0EEVyeR+E8pW4XY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}