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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0719611bf1e5a5eb40ed46c505c6a5f4aee1f9190a9dfb85035eff588d3fd581' 
  AND token = 'KBOL0Pnwvj5h3QBaeHeg465qjoInMCrrYbC2PUYsRd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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