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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '448b2776a6e8fce58fb60645589b3adefeb07565be9c0b2563c2bf6f89a6a6bb' 
  AND token = 'G4zL1IhTH9QT7uPlPKdd6FDULIQPe8Be+t5kw4eDP78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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