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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32014af4832a9d2bbfcf9bdce3c712459c594d679e44beac12fbba2de935a64e' 
  AND token = 'jl6tDR+hR6BG/jnL+cULk858+mGE+5Eeg5dTV/JlS1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}