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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e658ad5c293cbd262147c854bd74305b239d6bcc215585199be9506c2ad7911' 
  AND token = 'pCbT5+3rLqu7hGA17skyMORTY7mAikp1J0cPkR57y1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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