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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f2e7bae67e2565914a9e1d114ae700cd25ef50f500826bbf02b33e8a2c25df04' 
  AND token = 'lc0CIkvFWvjXFR/EplU7GQlxdEqvezmhxauX6d3NI2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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