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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84845296aeb41bdf978cbf66773df53e7371a83e0621f63e95602fbb7ab5f79c' 
  AND token = 'gzcVgBaZdNTfR1MKIt1TnVswKUMyi6MU0Mj2n6M2zDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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