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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afc7a8aaf9c55dd0bcedcb9749006810d61cef6b4202fbcab6a505857c85a07d' 
  AND token = 'egsEqTfHCNH+mb6izlTvip+1kd/YtGtgltFMPi70Z40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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