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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7058b8416f69163efbd805cc3d4c74a509bf19c8c6b9bf13d575a51bfc9b51ee' 
  AND token = 'v++o7vaxX5gWH1SS63q8dKrN2h/TIvpDSHx0qLAVxX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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