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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bccdc44556864100638b298037f5ab917166726f3ae21209f6423f6ee2fcd567' 
  AND token = 'HCGLadTSm/FGhizq4Jdn5Ep5vvb48//uvbrfexGQwI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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