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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfb49919635907f33217f4a6a63d3383c2024551a8f863de4ebeeaf73c7196ef' 
  AND token = 'VphXuk5/gsCB0wnKa2iLsgsZJQSkWH54skWn35MZodo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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