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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb32710b6a151f9964597ee6c99f135bf4330eb22ca20adf17965417b6337b51' 
  AND token = 'fgpL0bj5LCj2+LTBSccBpjWvfrXSsVrgYso8rI8v/xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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