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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd537ba966176d7261fee25bc3653acbc24c05437b6709c782eda5103c3cae402' 
  AND token = '34dokaGcQEsbTJ2fq3X0TeZnYgfSvNoEFIJMt6Be7I4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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