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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e08fb428f328d6a3a85ff6a535f97cb8126f1a71dfbf8fd46072ba19090930a5' 
  AND token = 'uIfl9gVyeRFW8OBlSLHWYNO3JaBVYtalcZgWUpu32sA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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