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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6adc1726039374d67bad6dae1e55781c09ed58779ca65a65111e230157f8bc7' 
  AND token = 'mCd1eCjLB3ZNK8ACqsUMIfVCGedq6bs9MfIvG3oxxN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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