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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9410acfd67ecc0448a30190f41a2c349b56e292bf5fa8eba3f34611eae18169f' 
  AND token = 'zNFwn7pACF0kDi7+724KRBeCyBSo8fq1u2BWd8lpBIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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