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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56f8c851add8ba3c0ec0ff60ffec170221a8267989124d85d8e7a5b252fe28d3' 
  AND token = 'nu+kEwqN1Kb9rJpOW4KQl+bjlz1Ls4d8l7r2x7Sx46U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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