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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f715c2dc766ae90ea1e67e92eeef1fe1118475c1a00996dcea6afc09a0f5056b' 
  AND token = 'csX6+FK1NTX4NXejcs3S0fx0bIVYkxeCceHbF/d6m1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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