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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f93129b3a3da097b22173a641170f2edd6eda61b17ac91f68fc6823caadb755' 
  AND token = 'nPoFy3XjvRVkpj0xEjKwbfd1q/n1iJyJaNr4YwlcAVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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