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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '293b0b0928e3a34de79e183b2c2379fa049dffe2550b81d50d00904a59cb791b' 
  AND token = 'DbeDNSDhA1bcDU2U9QRd6E9gS4o3X88DWjUMkDZjGKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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