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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd5ac8459c823cf99d5ae56a5f989db8af0e62be2252704623a15fbca7f7464' 
  AND token = 'cpNh3B6ThL1bw7+t3zDXsTkmi7qqinkZNMp2FNjoi1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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