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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e950965c76740e8a81c029a9529856d164166b89bd03d5735f0ccbb946e1c34a' 
  AND token = 'ckeUYfFzxZe8DtdOVbapRr3EZo4nCynLNmCibPOyEn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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