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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69cc9e413f02c22a14cc299ba562f0e355a7163b8b101c293984d8741d5782c3' 
  AND token = 'tcYgC5z/Qip4cZB6hLC9vKfVa/RksNoIIRanQ6eQm7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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