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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '93014961ff389f36a92de834eee1c4a01fcaec9593a85824b0b9d3a3db12a2ec' 
  AND token = 'GHa/aC37jP/KOH2SKLlG8CATYYhatz/Gmtr6e2GE0G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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