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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dafdb881381c2f1242a0189e02391ead1049078adf8adfc7b6fdd0466b60506' 
  AND token = 'AtxBd70mk6s6E3WDrP35eUQu4lp+gPA2YY7eag+RNaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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