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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6753fa06d070d5d444b03fa96f1282a888e6403d1515c0dbd45b06aa9fb2217c' 
  AND token = 'hpjQAFJ71oW/3Oo+aU1mBsH4Gx4K5U2ddW36bjR/i+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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