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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd67e7915d0219d8acb672520efc4ca6d325e6cf8ec5d428be6458605745012d2' 
  AND token = '6DN7hx0i4sDB6DCdKtomNiXn5KdO2Rz/F6aqp459M/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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