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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '270d584f957778a444b5e5ea13d9c2d24500ef62f15611c4e8c18ec17c68bc47' 
  AND token = 'AEQcmX73rzCF+yIxCXyLUpwLckrowICTgP2kqiLb80M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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