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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa791475e9f79bdf03fed032e09c5e4608bebe63542f47391c128254444f43fa' 
  AND token = '+ALa80t1z6JINMJwelH4YvW7vMdJ6n32h9+s8xzfDpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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