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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56df4cfdcd7fd139ab706d617ed862e47f1056fabae98d86855319b60fd56eae' 
  AND token = 'wRrzkzmCbA3ErP31gIw/s7po8GqYvimmH70ucPGk0X4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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