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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aae8e598c5f787d2187e261a62073ab931d71c5d86cdda56b483b1f024feed96' 
  AND token = 'bUtVJHs4PFIACae2qyc3BhHRSDTq7j7U7+4e+QHpYHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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