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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53f4c26f6d7e8215026b9474d2e2574db37fb45b8c57ed0abf1fb43b2ffe404b' 
  AND token = 'qhFAE6u2aMISzmsM0vEIgf/oFj41/mNBIQLnX1PCTD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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