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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b7f8f02ac2be78eeeb45287930ebace1026666ad2092825ac042adeb2370fae' 
  AND token = 'Gdfpaa08Lnkcox7efwvSY4xQkKLY3LYemFP3i6l8DOQ=' 
  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"
    }
  }
}