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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4136cf10e247dd26854b959008f8b1ff76432fdf6ea3f8726b200c4bd34ef57b' 
  AND token = 'yUiyNjdy1dngS2b7tJHSxAaJOp7kqcNCYM3lhogKHg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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