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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ec59d3ef9d3545d8e083a136b39347a2b7b22348b028b22e9da48855c07d7109' 
  AND token = 'wVw1UDL1w8cBckYf6fBT2emS566MIaZ5UcNO2dUWB2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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