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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02bc6cbab5b62a6143894a600e2abfed8872cd2d7743d2cdf9029953e7ac37dc' 
  AND token = 'V2WBViuwLp/MrCEHMkpm+RHhc1JXa9o6o5rgzWpiWF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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