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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07bae58d120e5ca082c9300bc7a62f42c9075f61f0720d9bd1dbc58e91a6c511' 
  AND token = 'Dkyi1O3RyWQC4NUws028Q61iM4sIiwoisdPSlEITT1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}