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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7225ec86c1bbaea4e5db0f3b43799907c5ea169ea03b961be6596c49ecf1fdf9' 
  AND token = 'VvfPLjsRj2B6L1nY3hY2suTaO6QxCMjF04H0VjseoE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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