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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2464661050a4aa4ff15126045fa227ad0e7b6db6de40033a6a0222fb5558e800' 
  AND token = 'wu6hkqKeosMpNAV6o0eNh2/hb94gxicOfbP1v1JU8+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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