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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b9a2195e26c19006a980c53ce07b7abd16c5c3092769d43b18497d210eeb50c6' 
  AND token = 'q9tspqT3UInHpZfI7ppRlqwYxniU5D+9OC0+h2AUTTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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