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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed4e3147e973ea7f56b25b2359ac29bf64bcf0014b5d2973a5b1d5cb1aa6cda0' 
  AND token = 'kzZCbY5JEK4DoM3GjfzujUoqbOiWYsNGc+AmvaaT9sc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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