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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '633ed54a25c28951c308004e9488a456be36ff5aee79f7aa6446d46fc305a516' 
  AND token = '0DZd7o/MHfNG48KEGlQESGDI16S7YCEKLe+TutKxV7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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