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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63a7abb48c19d698e416501e586e53384f3224a146113ce1b15419a1e006a013' 
  AND token = 'HBUKJdW/bB5fcdrFQ8hsyfgCe3S4BLcMOGjrVqNnc0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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