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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d4df8efe774d0b8b22926978ced84c51b32bce6128f6ee521f8f64d1048ff3c' 
  AND token = 'QM8tEtgXsyRYwJHok4vLyjBcFvM6geGWvlWWlAAQaDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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