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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff04268401e5e0649d7fbac37d3231d782dde6778c7d888680f5fc749335b6bd' 
  AND token = '/dXBnUf/CBCM3mBeJ7Oha7nnflCnMed95ivxjNdifXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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