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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b8ffd2ceff2ce7366dc38b67d61aa3866c978a6bd6b91f1e0373db087fe2e63' 
  AND token = '7vsWX9USDd0ah2H0FCYIVPUmOp5KrGus1JMHi+ehN/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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