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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c05d85d5efff76c395b5e674834381b2ec73250b5bd185ca4dead773d3eba79' 
  AND token = 'ZxbaJFUE2cKMX88nXTK9t2dVP/Me9Mz19mpJEqd1bzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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