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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1220356f3c5c09957a77f25da1dd6b82f5080672d457945ff28a09da65d16a99' 
  AND token = 'XZ06fK8XpSf5wwqxQ0bM06THTwwm7lxYO/MYVanBTtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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