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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '33b311bbfee724cbfa377f8cd6eb1f6ef7f8a919aa88c7d0286bd95dcf813f07' 
  AND token = '0a2IUXE3/ejo/CrcMFzSbNmUdHh4hSS9tS9PJy9BOjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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