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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89f594d6a4b572ca020eb480b286b5d363644db0416fe9bb05559d6f5b420b43' 
  AND token = 'Zz12km5/yuPRY64IRpENpfpAWX0o6TH1u2+wArbLipA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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