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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a69f2cbf43ab3b2bde2b67d59bbd18a847f8fe35884b1d36e84dc4f8bfeef1c1' 
  AND token = 'dhhGzRKG/Khl0HYZKBO2OSFhrRAKakK6bNSc/3ZEL74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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