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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '777612965874c12481baa97b298ee65796c6661c70e9fd79b16cc02975832a6c' 
  AND token = '56gbdWC+hR0Qg7FGO7zzSnACtSDZLG3m1tu83H6h4nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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