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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1e4b1d1e9fe0b70f92134d9adc514d66b0d5238054917d0f8c8dbafe3be5aa9b' 
  AND token = 'kK5buuJm5R/VbC8+rKZKG3k/Zc4hVbIEi2jla/URYaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00099

JSON explain

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