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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6085e68828a2da4e9cca6d628e29b14900c484d92865b4824e1800f25889fa2e' 
  AND token = 'jM/Uj/Uf8qhJdbu4HvWkBFZoVsfiZJem4p1Z8wHci/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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