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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e932552d1d58427fa3f8803c2a11600150efc846e4f28f6cd762e24ed2d5877' 
  AND token = '3J7piUDUDhNlvj+B+54mjgiGTlRXtiaB55bSHCHsPmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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