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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e69b8ecacb253e22242381ff6b0cee2486fff0a852d1c082b3923b4b1f4465d0' 
  AND token = 'aOhhFwXvhoptU+jUyeMLxNTjt4lG3bQ1XdGiopV4v8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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