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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '342bb28c64e745dd74145983b9a867186a818d934185b4b5f77530918a49b454' 
  AND token = 'rd1UoJPHkBzuW3iAvL/aKuk86VIPWaclD37vLSPG3tU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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