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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b48100c88188327f931358c237093ab3ba0ba3b6a69c902d1e348664bab6337c' 
  AND token = 'uhgcfI90bYBio9d70U45Kv0pBQs/2wIK4ohO4TiTCh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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