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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'bab984fb67ede89a6af801048181b3662cd475d94c01626f0dd2136fd9aceb81' 
  AND token = 'oCPnb5R0HecwjsQG+nM1skI9XfxP4b5GnLQWtVuaxTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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